March sugar futures were off 0.02 cent or 0.1 percentto 19.34 cents a lb at 1308 GMT. The contract dipped to 18.66cents on Friday, the lowest level for the front month sinceAugust 2010.

"Sugar failed to hold above the support zone composed of thelows of early September at 19.70/19.50," said Societe Generalein a commodities note.

"The correction is set to extend to 18.25 or even 17.25.Short-term, it is right under the channel resistance at 19.50.Only a clear break above would spark recovery signals to19.70/75 and 20.25 to begin with."

Thailand, the world's second-biggest sugar exporter afterBrazil, has revised down its forecast for sugar output in theyear to October 2013, to 9.4 million tonnes from 10 million,because of poor rain, a senior official said on Tuesday.

December white sugar on Liffe was down $1.30 or 0.2percent at $538.00 per tonne.

March arabica coffee futures were down 1.45 cents or1 percent at $1.5670 per lb. The contract sank to $1.4960 onFriday, the lowest level for the front month since June 19.

Dealers said that ample offers of Brazil and CentralAmerican coffees on the physical market were weighing on prices.

MACRO PRESSURE

Weakness in wider global markets also pressured a range ofcommodities including coffee on Tuesday, said Andrea Thompson,analyst at CoffeeNetwork, part of INTL FCStone.

The euro hit a two-month low and world share markets fellfor a fifth day on Tuesday as a dispute between internationallenders threatened to further delay an aid payment to Greece.

Coffee prices were not expected to fall further as investorsfocus on the 2013 season of production in top grower Brazil,which will be an off-year in the country's biennial crop cycle.

"It's unlikely that prices would go much lower purelybecause people for some time have been looking forward toBrazil's 2013/2014 season so that's going to limit the downsidethere," Thompson added.

January robusta coffee futures were down $20 or 1percent at $1,959 a tonne.

Vietnam's coffee trading gathered strength on Tuesday asexporters sought to sell fresh beans and exploit rising globalprices, while good weather has helped push farmers to speed theharvest in the main growing region, traders and officials said.

"There is more physical supply... so there is just a slightpressure from the fact that there is increased activity there,"Thompson said.

Coffee output in Vietnam's 2012/2013 season may fall around10 percent in its key growing area after a bumper harvest lastyear, a senior provincial official said on Tuesday, playing downfarmers' fears of a loss of up to 20 percent.

ICE March cocoa was up $15 or 0.6 percent at $2,396per tonne. The contract fell to $2,322 on Friday, the lowestlevel for the second month since late July.

Cocoa arrivals at ports in top grower Ivory Coast reachedaround 192,000 tonnes by Nov. 11 since the start of the seasonon Oct. 3, exporters estimated on Monday, roughly at par withthe same period a year ago.

"The arrivals and the flow of cocoa is on a par and ismoving as planned so there is nothing out there that could be ahiccup," said one London-based broker, adding that trading wassubdued as some Asian markets celebrated public holidays.

Benchmark Liffe March cocoa futures were up 3 poundsor 0.2 percent at 1,548 pounds per tonne.

"There is stability, the market is certainly comfortable inits current range," said the broker, noting the range stoodbetween 1,513 pounds and 1,625 pounds.